Ambeint temp sensitive valve timing advance issue 2001 Pathfinder

I have a thorny problem with my 2001 Nissan Pathfinder that nobody has been able to diagnose and repair.Once the ambient temp in the engine compartment reaches a certain point the valve timing will fail to advance with a corresponding demand for acceleration.I know it's ambient temp sensitive because the colder the outside temps are the longer the vehicle will run before the valve timing fails to advance.Problem is in bank one only.On warmer days timing will fail to advance once the dashboard temp gauge reaches halfway to normal internal running temps, which is about 1/4 way up the gauge and occurs after driving only a mile or so.On colder days the vehicle can reach normal internal engine temps and still run for a number of miles before the timing fails to advance.Service engine light stays on and downloads a hard code p1110.Nissan dealer says the needed repair is replacement of the valve timing control solenoid in bank one but I can't figure how a solenoid that bolts thru into the cam will be sensitive to external ambeint temps in the engine compartment.Camshaft angle sensor for bank one has had it's wiring probed several times and I'm wondering if a sloppy job of attaching probes has left wiring exposed to ambeint temp problems that would cause the sensor to fail once engine compartment heats beyond a certain point? Has anyone heard of a sensor or solenoid or wiring failure that causes this engine (3.5 liter, alum block, 6 cyl chain driven) to fail to advance valve timing sensitive to ambient engine compartment temperature? All advice appreciated and thanks, Paul

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